Yeah I discovered this yesterday searching one of our areas, I was rooting around in a pile of demolition debris and kept getting this weak signal amongst all the brick that I couldn't ever pin down......until I picked up a piece of brick and held the pinpointer up to it. Well whaddya know! Messing with the noisy ass mag in my phone I've been able to pick up some weird stuff but I never figured a metal detector would pick up on it. Surprise, surprise. Actually the potential for finding a buried foundation with a metal detector isn't a bad thing at all, very helpful actually, this is one ya might take note on folks, I might go try this on asphalt too just to see what I get. I'm gonna try my luck on certain ceramics as well. If I find anything hot I promise to report
